Nakano Note (Nakano wa Kangaeru noda) NK 4762 287P/Christensen
The following improved orbital elements, by S. Nakano, are from 214 observations 2006 to 2022. Perturbations by Mercury to Neptune, and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effects of sublimating molecule = CO (or N2) using Yabushita's theory (MN 283, 347). The mean residual is +/- 0.85 arc second. Residuals of re-observations in 2022 were -26" for Right Ascension and +7" for Declination from the prediction by T. Kobayashi in NK 4276. The comet will pass 0.91 AU from Jupiter on 2026 Nov. 22 UT. See the previous orbits in YC 2526, NK 1444, NK 2162, NK 2532, NK 2747 and MK4276. Epoch = 2023 June 25.0 TT T = 2023 July 5.96481 +/- 0.01476 (m.e.) TT Peri. = 189.10884 +/- 0.00217 Node = 139.04095 +/- 0.00009 (2000.0) Inc. = 16.32206 +/- 0.00004 q = 3.0342210 +/- 0.0000075 AU e = 0.2711637 +/- 0.0000053 a = 4.1631036 +/- 0.0000317 AU n' = 0.11603213 +/- 0.00000133 P = 8.494 +/- 0.0000972 years Y1 = +2.587 +/- 0.262 Y2 = +0.19973 +/- 0.00306 Y3 = -1.42785 +/- 0.05006 T = 2006 June 15.10737 TT Epoch = 2006 July 4.0 TT Peri. = 188.84872 e = 0.2706189 Node = 139.15425 (2000.0) a = 4.1663913 AU Inc. = 16.31564 n'= 0.11589481 q = 3.0388870 AU P = 8.504 years T = 2014 Dec. 28.35295 TT Epoch = 2014 Dec. 9.0 TT Peri. = 189.06973 e = 0.2691828 Node = 139.05755 (2000.0) a = 4.1789257 AU Inc. = 16.30075 n'= 0.11537377 q = 3.0540307 AU P = 8.543 years The predicted orbit for the 2032 return is as follows: T = 2032 July 29.85436 TT Epoch = 2032 July 27.0 TT Peri. = 196.10838 e = 0.2179654 Node = 135.86408 (2000.0) a = 4.4067765 AU Inc. = 16.31839 n'= 0.10654242 q = 3.4462518 AU P = 9.251 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060924 608 0.0 0.4- 140917 F51 0.4+ 0.4- 060830 699 (2.4- 0.6+) 060924 608 0.3+ 0.3- 140917 F51 0.4+ 0.5- 060830 699 (2.5- 0.6-) 060924 608 0.6+ 0.8+ 141018 215 0.7- 0.3+ 060830 699 1.6- 0.7- 060924 423 0.1+ 0.1+ 141018 215 0.5- 0.0 060830 699 2.2- 1.0+ 060924 423 0.7+ 0.4+ 141018 215 0.2- 0.2- 060914 703 0.1- 0.4- 060925 415 0.6+ 0.4+ 141109 F51 0.8- 0.5- 060914 703 0.1- 1.8- 060925 415 0.7+ 0.1+ 141109 F51 0.8- 0.6- 060914 703 1.1- 1.3- 060926 703 0.2- 0.8+ 141109 F51 0.8- 0.5- 060914 703 0.8+ 1.4- 060926 703 0.5- 1.8+ 141109 F51 0.7- 0.6- 060914 703 0.4- 1.5- 060926 703 0.1+ 0.8+ 2015/ 060914 703 0.1- 0.5- 060926 703 0.7- 1.9+ 150620 Q62 (3.8- 1.5-) 060914 703 0.8- 0.7- 060927 423 0.5+ 0.8+ 150620 Q62 (3.9- 1.6-) 060914 703 0.7- 0.7- 060927 423 0.4+ 0.2+ 150620 Q62 (3.2- 1.6-) 060914 E12 0.0 0.3- 060927 204 0.4+ 0.3+ 150813 215 1.9- 1.1- 060915 844 0.8- 1.0- 060928 204 0.6+ 0.3+ 150813 215 2.0- 0.6- 060915 844 1.5- 0.0 060928 423 0.7+ 0.3- 150813 215 (2.5- 0.5-) 060915 844 1.1- 0.3- 060928 423 1.3+ 0.4+ 150908 F51 1.0- 0.7- 060915 844 0.6- 1.1- 061001 423 0.0 0.5+ 150908 F51 0.9- 0.7- 060915 I77 (2.5- 0.6-) 061001 423 0.8+ 0.3- 150908 F51 0.8- 0.6- 060915 850 0.4- 0.8+ 061007 585 0.4- 0.2+ 150908 F51 0.9- 0.5- 060915 I77 0.5- 0.3+ 061007 204 1.9- 1.9+ 150915 G45 (2.7- 0.2+) 060915 844 1.5- 0.0 061010 423 1.6+ 0.1+ 150915 G45 (3.3- 0.2-) 060915 I77 0.2- 0.6+ 061010 423 (2.0+ 2.8+) 150915 G45 2.1- 0.3+ 060915 850 0.2+ 0.2- 061010 415 1.9+ 0.1+ 150915 G45 (2.7- 0.9-) 060915 850 1.4- 0.7+ 061010 415 0.7+ 0.2+ 150915 G45 1.6- 1.4- 060915 854 0.7- 0.1- 061011 673 1.5+ 0.9- 150915 G45 (2.3- 0.0 ) 060915 854 0.3+ 1.0+ 061011 673 1.1+ 0.7- 150915 G45 1.7- 0.2- 060915 703 0.3- 0.2+ 061011 673 1.1+ 0.7- 151003 G96 0.3- 0.5+ 060915 703 0.1+ 0.4- 061011 673 0.7+ 1.0- 151003 G96 1.1- 0.3+ 060915 703 0.3- 1.1- 061011 423 0.9+ 1.8+ 151003 G96 1.7- 0.9+ 060915 854 1.1- 0.2+ 061011 423 0.2+ 0.6+ 151003 G96 1.2- 0.6+ 060915 703 0.5- 1.1- 061012 423 0.1+ 1.6+ 151010 F51 0.2- 0.0 060915 423 0.9- 0.1- 061012 423 1.6+ 1.3+ 151010 F51 0.1- 0.0 060915 423 0.1- 1.1+ 061013 423 1.5+ 1.2+ 151010 F51 0.1- 0.1- 060915 E12 0.4- 0.3+ 061013 423 1.0+ 0.5+ 151010 F51 0.1- 0.1- 060915 E12 1.1- 0.3- 061018 423 0.9+ 2.2+ 151012 F51 0.2+ 0.0 060915 E12 0.8- 0.2+ 061027 703 0.4+ 1.4+ 151012 F51 0.1- 0.1- 060915 E12 1.6- 0.3- 061027 703 0.8+ 1.5+ 151012 F51 0.0 0.1- 060915 E12 0.2- 0.3+ 061027 703 0.1+ 1.2+ 151013 F51 0.1+ 0.0 060915 E12 1.2- 0.1+ 061029 415 0.8+ 0.1+ 151013 F51 0.1+ 0.0 060915 E12 1.0- 0.6- 061029 415 0.7+ 0.1- 151013 F51 0.1+ 0.0 060915 E12 0.2+ 0.2+ 061110 673 0.8+ 0.3- 151013 F51 0.1+ 0.0 060915 E12 0.8- 0.4+ 061110 673 1.1+ 0.1- 151017 G45 0.3+ 0.5+ 060915 E12 0.6- 0.8- 061110 673 0.9+ 0.2+ 151017 G45 1.6- 1.3+ 060916 415 0.1- 1.0- 061110 673 1.5+ 0.4+ 151017 G45 1.1- 0.6+ 060916 415 1.0- 0.5- 061111 G96 1.0+ 1.0- 151017 G45 (2.6- 1.1+) 060917 415 0.0 0.2+ 061111 G96 1.3+ 0.8- 151017 G45 1.2- 1.0+ 060917 415 0.2- 0.7- 061111 G96 0.8+ 0.8- 151017 G45 1.9- 1.6+ 060917 213 0.5- 0.6- 061111 G96 0.0 0.3- 151017 G45 0.2+ 0.5+ 060917 213 0.1+ 0.5- 061112 130 (3.1+ 0.4-) 151101 F51 0.2+ 0.6+ 060917 213 0.2+ 0.4- 061115 215 (2.5+ 1.7+) 151101 F51 0.3+ 0.2+ 060918 349 0.9- 0.8+ 061216 G96 (2.5- 1.3-) 151101 F51 0.3+ 0.3+ 060918 349 1.2- 0.5+ 061216 G96 0.3+ 0.8- 151101 F51 0.3+ 0.3+ 060918 349 1.0- 0.9+ 2007/ 151110 G45 1.4- 1.5+ 060919 213 0.2- 0.8+ 070108 G96 1.1- 1.7- 151110 G45 0.4- 1.5+ 060919 213 0.0 0.7+ 070108 G96 2.0- 1.4- 151110 G45 (0.2- 2.3+) 060919 213 0.1- 0.8+ 070108 G96 1.8- 0.6- 151110 G45 0.4- 2.0+ 060920 673 0.1- 0.3- 2013/ 151207 F51 1.1+ 1.3+ 060920 673 0.4+ 0.4- 130601 291(14.0+ 4.2+) 151207 F51 1.0+ 1.4+ 060920 673 0.9+ 0.1- 130601 291(13.7+ 3.4+) 151207 F51 1.1+ 1.2+ 060920 703 0.3+ 0.2- 130601 291(13.3+ 3.5+) 151207 F51 1.0+ 1.5+ 060920 703 0.8+ 0.4+ 130604 291(13.9+ 2.9+) 2016/ 060920 703 0.5- 0.7- 130604 291(14.0+ 2.9+) 161222 F51(12.5+ 10.4+) 060920 703 0.2- 0.6+ 130604 291(14.3+ 3.2+) 161222 F51(12.3+ 10.1+) 060921 215 0.3- 1.0- 2014/ 161222 F51(12.3+ 10.2+) 060921 585 1.5+ 0.5+ 140331 Q62 0.7+ 0.0 2022/ 060921 585 1.2+ 0.8- 140331 Q62 0.0 0.0 220529 G96 0.6- 1.7+ 060921 585 (3.1- 0.2+) 140331 Q62 1.1- 0.2- 220529 G96 0.3- 1.8+ 060921 585 0.8- 1.8- 140507 F51 0.3+ 0.1- 220529 G96 0.7- 1.6+ 060921 585 (2.7- 0.4+) 140507 F51 0.3+ 0.2- 220618 W62 0.2+ 0.5+ 060921 246 1.0+ 0.2+ 140507 F51 0.3+ 0.2- 220618 W62 0.6+ 1.5+ 060921 246 0.0 0.9+ 140622 F51 0.1- 0.8- 220618 W62 0.3+ 1.5+ 060921 246 0.0 0.9+ 140622 F51 0.0 0.8- 220619 W62 0.5+ 1.5+ 060921 246 0.0 1.3+ 140622 F51 0.1- 0.8- 220619 W62 0.2+ 1.5+ 060921 246 0.1+ 0.0 140718 215 1.3- 0.4+ 220619 W62 0.2+ 0.4+ 060921 246 0.4+ 0.0 140718 215 0.8- 0.4+ 220629 D29 0.2+ 1.8+ 060923 349 0.4+ 0.6+ 140718 215 0.4- 0.1- 220629 D29 0.0 1.2+ 060923 349 0.4+ 0.4+ 140731 D95 0.3+ 0.8- 220629 D29 1.2- 1.3+ 060923 349 0.7+ 0.6+ 140731 D95 1.0+ 0.0 220704 F52 0.4+ 1.5+ 060923 585 (2.9+ 1.1+) 140731 D95 0.1+ 0.8- 220704 F52 0.4+ 1.5+ 060923 585 0.5- 1.0- 140914 D95 0.3+ 0.0 220704 F52 0.5+ 1.5+ 060923 585 0.2- 0.5+ 140914 D95 0.5+ 0.1+ 220704 F52 0.4+ 1.3+ 060923 585 0.8+ 2.0- 140914 D95 0.8+ 0.4+ 060923 585 0.3- 0.4- 140917 F51 0.4+ 0.5- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 July 9